Find the average value of the following list of numbers.

88, 71, 83, 88, 80

To find the average value of a list of numbers, you need to sum up all the numbers in the list and then divide the sum by the total number of values in the list.

In this case, the list of numbers is {88, 71, 83, 88, 80}.

The sum of these numbers is 88 + 71 + 83 + 88 + 80 = 410.

Since there are 5 numbers in the list, we divide the sum by 5: 410/5 = 82.

Therefore, the average value of the list is 82.